FVSPS Sail Course, Class 5

Today’s OTW

•Weather Outlook•Boats Going Out•Sign-Up Sheet

What Are We DoingIn-Class Today?

- Prior OTW, Discuss- Questions, Sec. 3, 4, 5- Sail Book, Sec. 7, 8, 12- OTW Assignment

Yacht Club Bar Song, ChorusI love to sit around the yacht club bar

and talk about the things we’re going to do.I love to sit around the yacht club bar

because it doesn’t move.The swells are big and the winds are high

but that don’t bother me.Cause I never get lost and my tummy doesn’t toss

It’s a wonderful life on the sea.

Prior OTW, Discuss

1. What did you learn?2. What went right?3. What went wrong?

Questions/ClarificationSail Sections 3, 4, 5

• Section 3• Section 4• Section 5

FVSPS Sail CourseSail Book, Section 12

Tuning the Rig

(Section 12, Sail book)

Rig Tuning, Overview- Brion Toss quote, Rigger’s Apprentice, p. 272

- Rigging Issues:- Maintenance, Strength – Inspection/Tuning- Performance – Tuning

Turnbuckle,Chainplate

Rig Tuning, Tools- Diagnostic Tools:

- Sight up the mast- Measure wire tension with gauge- When heeled over under sail – sight and check

tension

- Adjustment tools:- Wrench- Your hand

Rig Tuning, Procedures- Mast centered athwart ship- Mast vertical- Stays appropriately tensioned- Check under sail

Rig Tuning,Performance Implications

- Mast bend

- Flatten mainsail vs. add draft- Tension backstay (esp. on fractional rig) to flatten

mainsail

- Mast tilt- Aft rake increases weather helm

FVSPS Sail CourseSail Book, Section 7

Stability

(Section 7, Sail book)

Stability

- Will the boat, when heeling, come back up?

- True or not: “Sailboats are made to heel?”- Compare Sailing dinghy vs. Keel Boat

Stability: Initial Stability

- “Initial” or “Form” Stability

- “Form” implies stability comes from the form of the boat, which has buoyancy that tries to right the boat

- Can represent using Vectors in a Diagram- E.g. Sail book, p. 55

Form Stability

- How related to beam of the boat?

- How related to “sea kindliness”?

Stability: Ultimate Stability

- How far can the boat heel and still come back upright?- “Limit of positive stability”- LOPS for the Pacific Seacraft 34 = 144 deg.- LOPS for the Hunter 41, Catalina 27 = 125 deg.

Ultimate Stability

- How related to beam of the boat?

- How related to ballast?

- How related to offshore safety?

Stability: Final Comments

- Compare Monohulls and Catamarans on Initial and Ultimate Stability.

FVSPS Sail CourseSail Book, Section 8

Balance

(Section 8, Sail book)

Balance

- What is Balance?- What affects Balance?

- Center of Effort- Center of Lateral Resistance

- See Sail, pp. 63-64

Balance Issues

- Dynamic Centers of Effort/Resistence- Yawing Moment

- Sail, p. 65

- Changes to make for Balance- Sail, pp. 65-66

Sail Section Questions,Assignments for Next Week

• Section 7• Section 8• Section 12

OTW Today

• Up-dated weather briefing?• List of people who want to sail today• Assignments to boats will be forthcoming

shortly during lunch period.• Any announcements from the captains?